Bis(2-Methoxyethyl)amine → Bis-(2-methoxy-ethyl)-prop-2-ynyl-amine

Reaction equation

[CH2:1](Br)[C:2]#[CH:3].[CH3:5][O:6][CH2:7][CH2:8][NH:9][CH2:10][CH2:11][O:12][CH3:13].C(=O)([O-])[O-].[Cs+].[Cs+]>CC(C)=O>[CH3:5][O:6][CH2:7][CH2:8][N:9]([CH2:10][CH2:11][O:12][CH3:13])[CH2:1][C:2]#[CH:3]

Participants

Procedure

Propargyl bromide (17.8 g, 150 mmol) was added dropwise to a mixture of bis(2-methoxy-ethyl)amine (20 g, 150 mmol) and cesium carbonate (49 g, 150 mmol) in 350 mL of acetone. The mixture was stirred overnight under nitrogen at room temperature. The inorganic salts were then filtered off, and the solvent was removed. The residue was dissolved in saturated sodium bicarbonate solution and extracted with ethyl acetate. The organic extracts were then evaporated to give 20 g of bis-(2-methoxy-ethyl)-prop-2-ynyl-amine: mass spectrum (m/e): M+H 172.